JPH0819513A - Connecting structure for fluid pipeline of endoscope - Google Patents

Abstract

PURPOSE:To provide a connecting structure for fluid pipelines of an endoscope which ensures sanitation with no risk of inter-patient infection by eliminating any part likely admitting stagnation of the fluid from the connection part of pipelines. CONSTITUTION:A connecting base 42 is fixed to the end of a connection pipe 41, and a call-in screw 43 provided penetratively with a communication path leading to the connection pipe 41 is fitted in the mouth opening of the connecting base 42, which is drawn nearer and secured. In this connecting structure for fluid pipelines of an endoscope, the mouth part 43c of the communication path formed at the call-in screw 43 is formed with a non-circular cross section as detained with a fastening tool.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for connecting fluid lines of an endoscope.

[0002]

2. Description of the Related Art FIG. 8 shows a structure for connecting fluid channels of a conventional endoscope disclosed in Japanese Patent Laid-Open No. 126828/1990, which has two forceps channels 11 and 12 and two forceps insertion caps. This is a portion of the suction conduit switching mechanism 13 for selectively communicating the suction connection pipe 41 attached to the tip of the suction tube 40 with the forceps insertion passages 31, 32 that communicate with 29, 30.

In the suction conduit switching mechanism 13, two forceps insertion passages 31 and 32 are formed in a pedestal 25 fixed to the exterior cover 21. The connection mouthpieces 35, 35 are fixed to the ends of the channel connection pipes 11a, 12a attached to the base ends of the forceps channels 11, 12, respectively.
The forceps insertion passages 31 and 32 at the lower end are inserted and connected. Reference numeral 33 denotes an O-ring for sealing which is attached to each of the connection mouthpieces 35, 35. Further, a flange-shaped connection mouthpiece 42 is fixed to the end portion of the suction connection tube 41 attached to the tip of the suction tube 40. The connection base 42
A lead-in screw 43 screwed into the base of the base pulls the connection mouthpiece 42 from the inside of the base 25 and fixes it to the base 25. Reference numeral 44 is an O-ring for sealing.

[0004]

As shown in FIG. 8, the lead-in screw 43 needs to bring in the connection mouthpiece 42 from the pedestal 25 and screw it into it. Needs to be rotated from the inside of the pedestal 25.

Therefore, conventionally, as shown in FIG.
An engaging groove 43b for engaging a driver-shaped tool is formed in the head of the lead-in screw 43, and the tip of the tool inserted into the pedestal 25 is engaged therewith, and the lead-in screw 43 is formed.
Was rotating.

However, if such an engaging groove 43b is formed in the head of the intake screw 43, the filth that is sucked toward the suction tube 40 through the communication passage 43a in the intake screw 43 is engaged. It accumulates inside.

Moreover, since the inside of the engaging groove 43b cannot be cleaned with a cleaning brush or the like, if malignant bacteria, virus or the like is mixed in the sewage, there is a risk of causing inter-patient infection through it. there were.

[0008] Therefore, an object of the present invention is to provide a hygienic endoscope fluid line connection structure which eliminates a portion where fluid is likely to accumulate in a fluid line connection portion and which is free from the risk of inter-patient infection. And

[0009]

In order to achieve the above-mentioned object, the connection structure of the fluid conduit of the endoscope of the present invention has the above-mentioned structure at the mouth opening of the connection mouthpiece attached to the end of the connection tube. In the connection structure of the fluid conduit of the endoscope, which is formed by penetrating the connection screw that is formed by penetrating the communication passage communicating with the connection pipe to fix the connection mouthpiece. The mouth portion of the communication passage is formed in a non-circular cross-sectional shape that engages with the tightening tool.

[0010]

Embodiments will be described with reference to the drawings. In FIG. 2, the suction operation valve 3 and the air / water supply operation valve 4 are arranged side by side in the upper front part of the grip part 2 of the operation part 1 of the endoscope, and the bending operation knob 5 is arranged in the right part. Has been done. Reference numeral 6 is an eyepiece, and 7 is a suction connection pipe connected to a suction device (not shown).

Reference numeral 8 denotes a flexible insertion portion, and the insertion portion 8
Two forceps insertion ports 9 and 10 into which a treatment tool such as forceps is inserted are formed in a connection portion 20 between the operation portion 1 and the operation portion 1 so as to be closely aligned and slightly inclined forward. The two forceps channels 11 and 12 inserted into the insertion portion 8 are connected to the forceps insertion ports 9 and 10, respectively.

Reference numeral 13 denotes two forceps channels 11 and 12.
Is a suction conduit switching mechanism for selectively communicating one or both of them with the suction device via the suction connection pipe 7 or the like, and is integrally provided immediately below the forceps insertion ports 9 and 10. There is. On the front surface thereof, an operation knob 14 for performing a switching operation of the suction conduit switching mechanism 13 is rotatably projected.

FIG. 1 is a side sectional view of the connecting portion 20, and FIG. 3 is a plan sectional view. In the figure, reference numeral 15 is a frame of the operation unit 1, and the above-mentioned connecting portion 20 has an upper half portion covered with a first outer cover 21 and a lower half portion with a second outer cover 22.
Is covered by. The joint between the two exterior covers 21 and 22 is water-tightly connected by a joint pipe 24 to which a sealing O-ring 23 is attached.

The forwardly inclined protruding portion 21a of the first exterior cover 21
A pedestal 25 that serves as a base for both the suction conduit switching mechanism 13 and the forceps insertion ports 9 and 10 is disposed therein. Reference numeral 26 is an O-ring for sealing, and 27 is a cover member made of an elastic rubber material or the like.

The pedestal 25 has two forceps insertion caps 29,
30 is screw-connected from above, and the forceps insertion ports 9 and 10 communicate with the forceps channels 11 and 12 via two forceps insertion passages 31 and 32 penetrating the pedestal 25. ing.

11a and 12a are forceps channels 1
It is a metal channel connection pipe connected to the ends of the forceps 1 and 12 and is watertightly connected to the ends of the forceps insertion passages 31 and 32 by a connection mouthpiece 35 to which an O-ring 33 is attached.

Since the different cross-sectional portions are shown in FIG. 1 in a combined manner, the forceps insertion passages 31 and 32 appear to be blocked in the middle, but the forceps insertion passages 31 and 32 are shown.
Penetrates the pedestal 25 as shown in FIG. 4 showing the IV-IV cross section.

As shown in FIG. 4 and FIG. 5 showing the arrow V, the connection mouthpiece 35 is a single plate-shaped member formed in an oval shape and has two channel connection pipes 11a and 12a.
The ends of are fixedly connected by silver brazing or the like.

Then, the connection mouthpiece 35 is fitted into the pedestal 25 so that there is no gap, and is firmly pressed against the pedestal 25 by the fixing screw 36 and fixed by screws. Therefore, the flow path portion connected by the connection mouthpiece 35 does not have a recess for accumulating waste liquid.

Further, the fitting surface with the pedestal 25 is sealed by the O-ring 33 mounted on the outer peripheral surface of the connection mouth ring 35, whereby both forceps insertion passages 31, 32 are provided.
The leak between the outside and the outside is blocked.

The operation knob 14 is provided at the center of the pedestal 25.
A switching valve 37 directly connected to is rotatably fitted.
The fitting portion between the operation knob 14 and the switching valve 37 has a non-circular cross section and is fixed to each other by a fixing screw 47.

An adhesive is filled in the recess of the head of the fixing screw 47. 38 is an O-ring for sealing. Then, the communication groove 39 formed at the bottom of the switching valve 37
Are communicated with the suction operation valve 3 via the suction tube 40.

Reference numeral 41 is a suction connection pipe connected to the tip of the suction tube 40 connected to the suction operation valve 3. A flange-shaped connection mouthpiece 42 having a large diameter is attached to the end of the suction connection pipe 41 by silver brazing or brazing.

The attracting screw 43 is screwed from the inside of the pedestal 25 to a female screw formed at the base of the connection mouth ring 42, pulling the connection mouth ring 42 toward the pedestal 25 side and fixing it, thereby sucking. Tube 40 and suction connection tube 4
1 communicates with the forceps insertion passages 31, 32 in the pedestal 25.

The lead-in screw 43 has a head portion fitted in the pedestal 25 formed to have a large diameter so as not to come out from the pedestal 25 to the side of the connection mouthpiece 42. A communication passage 43a, which communicates with the pipe 41, is provided so as to penetrate in the axial direction. O-rings 44 and 45 for sealing are respectively attached to the fitting surface of the outer periphery of the lead-in screw 43 with the connection mouthpiece 42 and the fitting surface with the pedestal 25.

As shown in FIG. 6, at the head-side end of the lead-in screw 43 located inside the pedestal 25, the mouth of the communication passage 43a is formed in a long hole-shaped cross section.
Then, when the lead-in screw 43 is screwed into the connection mouthpiece 42, as shown in FIG. 7, the tip of the tool 100 is inserted into the pedestal 25 and engaged with the long hole portion 43c to rotate the tool 100. If so, the lead screw 43
Rotates and is screwed with the connection mouthpiece 42, and the connection mouthpiece 42 is attracted and fixed to the pedestal 25 side.

Thus, the long hole portion 4 of the lead-in screw 43
Since the portion 3c may be rotated by engaging the tool 100, the cross-sectional shape does not necessarily have to be an ellipse, and may be a non-circular shape that engages with the tip of the tool 100 and transmits a rotational force.

The boundary between the elongated hole portion 43c having an oval cross section and the circular communication passage 43a is formed as a smooth slope so as to prevent a step from being formed. It's easy to do.

As shown in FIG. 4, the pedestal 25 has a communication groove 39 at the bottom of the switching valve 37 and both forceps insertion passages 31, 32.
Communication passages 46, 46 for communicating with the suction tube 40 are formed by rotating the switching valve 37.
The communication state between the forceps insertion passages 31 and 32 (that is, the communication state between the suction operation valve 3 and the forceps channels 11 and 12) can be changed.

In this embodiment, the switching valve 37 has two fan-shaped symmetrical cutouts. In the state shown in FIG. 4, the two forceps channels 11 and 12 both communicate with the suction operation valve 3. ing. Then, by rotating the switching valve 37,
Only one of the forceps channels 11 and 12 can be communicated with the suction operation valve 3.

Returning to FIG. 1, reference numeral 51 denotes a fixing member fixed to the pedestal 25 by a fixing screw 52, which is fitted in the hole formed in the wall portion of the exterior cover 21 from the outside. It is fixed to the inner pedestal 25.

Therefore, if the fixing member 51 is fixed to the pedestal 25 with the fixing screw 52, they are simultaneously fixed to the exterior cover 21. A plurality of sealing O-rings are also attached to this fixed portion.

The switching valve 37 has a click spring 54 fixed by a screw 49 and a click ball 5 urged toward the uneven surface of the fixing member 51 by the click spring 54.
5 is mounted, and the switching valve 37 can be stopped at the optimum position for switching the suction pipeline.

Reference numeral 56 denotes a plastic cover which covers the click portion, and a metal cover 57 screwed into the inside thereof is detachably attached to the fixing member 51 by a C-shaped snap ring 58. There is.

In the apparatus having the above-described structure, the switching valve 37 is rotated by rotating the operation knob 14, and either one or both of the two forceps channels 11 and 12 is selectively selected. It can be communicated with the suction operation valve 3. If the suction operation valve 3 is operated there, the forceps channel 1 on the side communicating with the suction operation valve 3
Suction is performed through 1 and 12.

The present invention is not limited to the above embodiment, and for example, the present invention is not limited to the suction flow path of the endoscope and may be applied to the flow path of air supply or water supply.

[0037]

According to the present invention, since the mouth portion of the communication passage formed in the lead-in screw for pulling and fixing the connection mouthpiece is formed to have a non-circular cross-sectional shape, the tip of the tightening tool is attached thereto. It is possible to engage the connection part from the inside and rotate the lead-in screw to pull the connection mouthpiece and fix it.

Therefore, it is not necessary to form a concave portion for collecting dirty liquid in the tool engaging portion of the intake screw, and the engaging portion can be easily brushed and cleaned by passing a cleaning brush. It is possible to effectively prevent inter-patient infection due to residual sewage.

[Brief description of drawings]

FIG. 1 is a side sectional view of an embodiment.

FIG. 2 is a perspective view of an example.

FIG. 3 is a plan sectional view of an example.

FIG. 4 is a sectional view taken along line IV-IV of the embodiment.

FIG. 5 is a view on arrow V of the embodiment.

FIG. 6 is a perspective view of a lead-in screw according to the embodiment.

FIG. 7 is a side sectional view of the example during assembly.

FIG. 8 is a side sectional view of a conventional example.

FIG. 9 is a perspective view of a conventional lead-in screw.

[Explanation of symbols]

 41 suction connection pipe 42 connection mouthpiece 43 invocation screw 43a communication passage 43c long hole portion (mouth portion)

Claims (1)

[Claims] 1. A pull-in screw formed by penetrating a communication passage communicating with the connecting pipe into an opening at the base of the connecting pipe attached to an end of the connecting pipe to draw the connecting pipe. In the connection structure of the fluid conduit of the endoscope that is fixed by fixing the opening portion of the communication passage formed in the lead-in screw, is formed into a non-circular cross-sectional shape that engages with a tightening tool. And the connection structure of the fluid line of the endoscope.